444 PEOF. C. CHILTON ON DETO, A SUBANTAECTIC 



DeTO MAEINA {Chilton). (PI. 39. figs. 19-23.) 



Philougria marina, Chilton, 1884, p. 463, pi. 11. 



„ „ Chilton, 1901, p. 328. 



„ „ Stebbing, 1900, p. 565. 



Deto marina, Budde-Liind, 1906, p. 85, pi. 4, figs. 39-41. 



Specijic description. — Body oblong.oval, length rather more tluui twice the 

 greatest breadth. Head with surface irregularly tuberculate, front projecting 

 into a triangular lobe ending subacutely, lateral lobes very broad, occupying 

 nearly all the side-margin ; eyes large, on rounded prominences raised above 

 the lateral lobes. ^Surface of perseon somewhat scabrous, with a few low 

 inconspicuous rounded tubercles, most marked on the anterior segments ; 

 epimera not very greatly expanded, each with a slight oblique ridge running- 

 outwards and backwards to the posterior angle. Segments 3, 4, and 5 

 ol' pleon with well-developed epimera which have the posterior angles 

 acute, terminal segment triangular, sides slightly concave, extremity broadly 

 rounded. 



Autennfe (fig. 20) about one-third the length of the body, slender, fifth 

 joint slightly longer than the third and fourth together ; flagellum as long- 

 as the fourth, its first three joints subequal in length, fourth slender, about 

 half as long as the preceding, and merging almost imperceptibly into a 

 pencil of very short setaj ; whole surface of antenna covered with minute 

 short spinules and fine short setae. 



Legs (figs. 21 & 22) subequal in length, the posterior ones only slightly 

 increasing in length ; all rather spiny, the largest spine, which splits 

 towards the end, being situated near the distal end of the carpus. 



Uropoda (fig. 23) with base broad, reaching to the end of the terminal 

 segment ; outer ramus longer than base, ta})ering to the end, which bears a 

 few short setse ; inner ramus arising more anteriorly, slender, only slightly 

 tapering, ending with pencil of long setae. 



Length of largest specimen (a female Avith brood-plates developed) 6 mm. 



Colour. Yellowish, with marking of a dark brown. 



Ilahitat. Coogee Bay, near Port Jackson, New South Wales (Chas. Chilton 

 coll., January 1884). 



This species is known only from Coogee Bay, near Port Jackson, New 

 South Wales, where I collected it in January 1884; it was found near high- 

 water mark, and most of the specimens were taken out of the water, which 

 was nearly high tide at the time. Unfortunately my specimens are all 

 small; the largest is 6 mm. long, and is a female with brood-pouches 

 developed ; the others are probably immature. I can find no adult male 

 among my specimens, and am unable therefore to say whether there are 

 any secondary sexual characters or not. Several friends, especially Mr. T. 

 Whitelegge, of the Australian Museum, have since endeavoured to collect 

 additional specimens for me from the same locality, but without success. 



